CVE-2009-3639

Name	CVE-2009-3639
Description	The mod_tls module in ProFTPD before 1.3.2b, and 1.3.3 before 1.3.3rc2, when the dNSNameRequired TLS option is enabled, does not properly handle a '\0' character in a domain name in the Subject Alternative Name field of an X.509 client certificate, which allows remote attackers to bypass intended client-hostname restrictions via a crafted certificate issued by a legitimate Certification Authority, a related issue to CVE-2009-2408.
Source	CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
References	DSA-1925-1

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
proftpd-dfsg (PTS)	bullseye	1.3.7a+dfsg-12+deb11u2	fixed
	bullseye (security)	1.3.7a+dfsg-12+deb11u5	fixed
	bookworm, bookworm (security)	1.3.8+dfsg-4+deb12u4	fixed
	trixie	1.3.8.c+dfsg-4	fixed
	forky, sid	1.3.9~dfsg-3	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Urgency	Origin
proftpd-dfsg	source	etch	1.3.0-19etch3		DSA-1925-1
proftpd-dfsg	source	lenny	1.3.1-17lenny4		DSA-1925-1
proftpd-dfsg	source	(unstable)	1.3.2a-2	low

http://bugs.proftpd.org/show_bug.cgi?id=3275